I haven't ran into nearly as many bugs as I've seen from others, but there is definitely a performance hit for me. The UI in general feels sluggish compared to sequoia.

I have two M4 Pro's w/ 24GB of RAM (one work, one personal). Work is on Tahoe, personal on sequoia and there's a really noticeable difference in overall UI responsiveness. It becomes even more pronounced when I hook up to my external display (32" 4k).

In a way it reminds me of the olden days of running KDE or Compiz with every fancy effect enabled but on an underpowered GPU. Yeah, it technically works, but it's not necessarily a fluid or enjoyable experience.

I have my own other nitpicks about liquid glass & the design (there's tons of papercuts here), but that doesn't necessarily impact stability.